ROTATIONAL ANGLE DETECTOR AND ITS TEMPERATURE CORRECTING METHOD

Title:

ROTATIONAL ANGLE DETECTOR AND ITS TEMPERATURE CORRECTING METHOD

Document Type and Number:

WIPO Patent Application WO/2003/100353

Kind Code:

A1

Abstract:

A first sin phase voltage representative of the rotational angle of a resolver is derived from the sum of a rotational angle voltage having a temperature element and a bias voltage. The rotational angle voltage and the bias voltage are determined by subtracting or adding the values of rotational angle of a rotor at the maximum peak point (Ѳ=90&ring ) and the maximum bottom point (Ѳ=270&ring ). The trans former efficiency K(T) and the phase difference &agr (T) of the rotational angle voltage having a temperature element, and the impedance R(T) and the phase difference β(T) of the common earth line of the bias voltage having a temperature element are then determined. The rotational angle is determined by substituting them into an expression for determining the first sin phase voltage. According to the arrangement, rotational angle of the rotor can be detected with high accuracy without being affected by temperature variation.

Inventors:

URA NORITAKE (JP)

Application Number:

PCT/JP2003/006630

Publication Date:

December 04, 2003

Filing Date:

May 28, 2003

Export Citation:

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Assignee:

TOYODA MACHINE WORKS LTD (JP)
URA NORITAKE (JP)

International Classes:

G01D3/032; G01D5/20; G01D5/245; G01D5/244; H02K24/00; (IPC1-7): G01D5/245

Foreign References:

EP1054238A2	2000-11-22
JP2000283861A	2000-10-13
EP1090699A2	2001-04-11
EP0772025A1	1997-05-07
JP2002127173A	2002-05-08

Other References: